Pump



J. M. SHIMER May 21, 1929.

PUMP

Filed Dec. 16', 1927 2 Sheets-Sheet INVENT'OR.

May 21, 1929.

J. M. SHIMER PUMP IN VEN TOR.

Patented May 21, 1929. I

UNITED STATES PATENT OFFICE,

.ron -M. SHIMER, or WILKINSBURG, PENNSYLVANIA, AssieNon 'ro WILSON- SNYDER LMANUFACTUBING COMPANY, A CORPORATION or PENNSYLVANIA.

PUMP.

I Application flledDecember 16, 1927. Serial No. 240,448.

This invention relates to pumps and more particularly to hot oil pumps such as are employed in oil refining and oil cracking plants.

5 A pump used in pumping hot oil at a temperature of from 600 to 800 F. is subject to considerable expansion and, with ordinary pump constructions, this expansion causes misalignment of the cylinder bore with the power end, and also misalignment of the tie rod bearings with the tie rods associated therewith. Such misalignment is, of course, avery undesirable operating condition.

,15 An objectof this invention is to'provide a pump of the type set forth, so constructed and arranged that expansion or contraction of the pump block will have no effect on the, alignment of the cylinder bore or other parts.

Afurther object is to provide a hot oil pump having an improved pump or cylinder block supporting mechanism.

A still further object is to provide an arrangement of the type set forth which will be simple in construction, effectivein operation and relatively cheap to manufacture and assemble.

These and other objects which will be apparent to those skilled in this particular art are accomplished by means of the invention illustrated in the accompanying drawings,

in which Figure 1 is a view in side elevation of the liquid end of a hot oil pump constructed in accordance with one embodiment of this invention, and Fig. 2 is an end elevation taken from the right of Fig. 1 with certain parts broken away and shown in section.

In the particular embodiment of this invention which has been chosen for illustration, a cylinder block 5 of standard construction is associated with two oppositely disposed reciprocating plungers 6 and 7, respecas or foundation, as hasusually been done,

tively, which are provided with the usual reciprocating cross heads 8 and 9 connected by will result in a substantial misplacement of the cylinder borecenter, when the pump is in operation and pumping oil at high temperaturc. The extreme temperature of the liquid results in such an expansion of the pump block as to cause a lifting of the oilinder bore vertically and consequently shifting such bore out of alignment with the power end. When the tie rod bearings are supported, as is usual, directly upon the cylinder block, it will be apparent that the lat-',

eral expansion of such block will result in the outward movement of the'be'arings relatively to the tie rods with the result that the latter are more or less bowed and bind in such bearings.

In order to overcome the disadvantages inherent in the standard method of supporting pumps when such pumps are sub ected to any considerable amount of expansion or contraction, I provide supports for the pump of such construction as to permit free and practically unlimited expansion and contraction thereof without causing any misplacement of the parts. As illustrated, the cylinder block 5 is supported at the side so as not to directly engage the foundation itself, instead of resting upon an ordinary foot or other standard form of foundation. The supporting structure engages the cylinder block at points near the vertical center thereof. A foundation 13 is provided with supporting castings 14 on each side thereof spaced from the cylinder block. Each casting has a tie rod bearing 15 through which the associated tie rod extends, and each bearing is rigidly secured to the supporting foundation in any desired manner. Shims 16 are preferably positioned under each casting so as to permit accurate adjustment and leveling of each casting on its support. The top of each. casting is provided with a fiat face on which a block supporting bracket 17 is slidablv mounted and each bracket is rigidly secured to the ad- 100 jacent face of the cylinder block 5 in any de- A sired manner. Preferably, each bracket may be provided with a lu 18 seated ina lug receiving bore 19 provi ed in the face of the block. It will be observed, therefore, that it 105 is important that the lateral projections or brackets 17 shall provide at both sides of the block horizontal, downwardly-facing flat shoulders which rest and slide on horizontal, upwardly-facing flat faces formed on the 110 'ference by any foundation members 14. It will be observed also that it is important that, in addition to suspending the cylinder block slidably 011 the upwardly-facing horizontal faces of the foundation members, there shall be provided a clearance all around the cylinder block, so that the body of the cylinder block shall be free to expand in all directions without interpart' of the foundationpto the end that alinement of the plungers and the cylinder-bore shall be always maintained irrespective of expansion and contraction of the cylinder block.

If mechanical power is employed, the supporting brackets will be securedto the cylinder block above the horizontal plane of the center of the cylinder bore. In this way the expansion of thesupports for the block upwardly under the influence 'of the hot oil 7 is counteracted by the expansion of the block downwardly from the point of support, with the result that the location of the center line of the cylinder bore remains constant. If steam power is employed, the supporting brackets will be connected to the cylinder block at points nearer to such plane. It will be apparent that this manner of mounting the cylinder block permits free expansion thereof around the center of the cylinder bores in all directions with the result that the plunger bore remains in alignment with the power end of the installation. Supporting the tie rod bearings in a separate casting which is not directly connected to the block in any manner permits the tie rod bearings to keep their original position in spite. of any expansion or contraction of the associated cylinder block.

What I claim as new and desire to secure by Letters Patent is:

1. The combination in a pump having a cylinder block, of oppositely disposed reclprocating plungers, a cross head associated with each of said plungers, tie rods connecting said cross heads and bearings for said tie rods inde endent of the cylinder block.

2. The com ination in a hot oil pump having a cylinder block, of oppositel disposed reciprocating plun ers, a cross ead associated with each of said plungers, tie rods connecting said cross heads and means for supporting the cylinder block so as to permit movement thereof independent of said bearings.

3. The combination'in'a hot oil pump having a cylinder block, of a supporting foundation provided with elevated supporting shoulders on each side of said block, supporting castings mounted on each shoulder and provided with tie rod bearings and block supporting castings secured to the side faces of said block and slidably mounted upon said first castings so as to permit free expansion of said block independent of its support.

4. The combination with a pump block having a cylinder bore of a supporting foundation spaced from said block and means for mounting said pump block on said founda tion so that the center line of said cylinder bore is substantially stationary irrespective of expansion or contraction of said block or foundation.

5. The combination in a hot oil pump, of a cylinder block provided at opposite sides with projecting members having their under faces flat and horizontal, and a foundation for supporting said cylinder block, said foundation having supporting members at each side of said cylinder block provided with horizontal upwardly-facing-flat faces on which slidably rest the downwardly-facing flat faces of the cylinder block, said 0 linder block at a point below the said at supporting faces being narrower than the foundation members and the bottom of the cylinder block being unsupported by the foundation, whereby the cylinder block will be free to expand in all directions with reference to the supporting members while maintaining the center line of the bore of the cylinder substantiall constant with'respect to'the center line 0 the plunger's work- "ing therein.

the foundation and the cylinder block to permit the cylinder block to expand in all directions without interference by the foundation, plun ers working in the opposite ends of the ore in said cylinder block, a cross-head connected to each of plungers, and a tie-rod connecting the ends of said cross-heads and resting in the tie-rod bearings aforesaid, for the purposes herein set forth.

In testimony whereof,- I have hereunto, subscribed my name this 13th day of Decem ber, 1927. I

JOHN M. SHIMER.

said 

